Attachment Report

This document pretains to SES-MOD-INTR2019-01736 for Modification on a Satellite Earth Station filing.


FREQUENCY COORDINATION AND INTERFERENCE
            ANALYSIS REPORT


                         Prepared for
           Alaska Public Telecommunications, Inc.
                     ANCHORAGE, AK
                   Satellite Earth Station




                        Prepared By:
                       COMSEARCH
                19700 Janelia Farm Boulevard
                    Ashburn, VA 20147
                       May 22, 2019


                                                      TABLE OF CONTENTS
1. CONCLUSIONS ............................................................................................................................................ 3
2. SUMMARY OF RESULTS ............................................................................................................................ 4
3. SUPPLEMENTAL SHOWING ....................................................................................................................... 5
4. EARTH STATION COORDINATION DATA .................................................................................................. 6
5. CERTIFICATION ......................................................................................................................................... 10




Frequency Coordination and Interference Analysis Report                                             05/22/2019                        Page 2 of 10


1. CONCLUSIONS



An interference study considering all existing, proposed and prior coordinated microwave
facilities within the coordination contours of the proposed earth station demonstrates that
this site will operate satisfactorily with the common carrier microwave environment.
Operation will be restricted to the bandwidth shown in Section 4 of this report.




Frequency Coordination and Interference Analysis Report   05/22/2019         Page 3 of 10


2. SUMMARY OF RESULTS


The great circle interference cases identified during the interference study for this earth
station were addressed in the previous coordination.

Due to the minor nature of these changes, no response is required for this notice.




Frequency Coordination and Interference Analysis Report   05/22/2019          Page 4 of 10


3. SUPPLEMENTAL SHOWING
Pursuant to Part 25.203(c) of the FCC Rules and Regulations, the satellite earth station proposed in this
application was coordinated by Comsearch using computer techniques and in accordance with Part 25 of
the FCC Rules and Regulations.

A minor modification for this earth station was sent to the below listed carriers with a letter dated 05/22/2019.

        Company
        ACS Long Distance License Sub, Inc.
        ACS Wireless License Sub, Inc.
        ACS of Anchorage License Sub, Inc.
        AT&T Mobility Spectrum LLC - AK
        Alascom Inc
        Alaska Pipeline Company
        Alaska Public Telecommunications, Inc.
        Alaska Railroad Corporation
        Chugach Electric Association, Inc.
        Enstar Natural Gas Company
        GCI Communications Corp.
        Homer Electric Association
        MATANUSKA KENAI INC
        MTA Communications, LLC
        Matanuska Telephone Association, Inc.
        Matanuska-Susitna, Borough of
        Norstar Pipeline Company
        State of Alaska
        United Utilities, Inc.
        Verizon Wireless (VAW) LLC - Alaska




Frequency Coordination and Interference Analysis Report                 05/22/2019              Page 5 of 10


4. EARTH STATION COORDINATION DATA
This section presents the data pertinent to frequency coordination of the proposed earth station that was
circulated to all carriers within its coordination contours.




Frequency Coordination and Interference Analysis Report            05/22/2019            Page 6 of 10


                                                              COMSEARCH
                                                      Earth Station Data Sheet
                                             19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                               (703)726-5500 http://www.comsearch.com

Date:                                    05/22/2019
Job Number:                              190522COMSTC03
Administrative Information
Call Sign                                E180008
Licensee Code                            KAKMTV
Licensee Name                            Alaska Public Telecommunications, Inc.
Site Information                         ANCHORAGE, AK
Latitude (NAD 83)                        61° 11' 24.8" N
Longitude (NAD 83)                       149° 48' 33.7" W
Climate Zone                             A
Rain Zone                                2
Ground Elevation (AMSL)                  50.29 m / 165.0 ft
Link Information
Satellite Type                           Geostationary
Mode                                     TO - Transmit-Only
Modulation                               Digital
Satellite Arc                            90° W to 177° West Longitude
Azimuth Range                            117.0° to 210.4°
Corresponding Elevation Angles           5.4° / 17.1°
Antenna Centerline (AGL)                 11.74 m / 38.5 ft
Antenna Information                            Transmit
Manufacturer                                   SSE
Model                                          SSE-45
Gain / Diameter                                46.7 dBi / 4.5 m
3-dB / 15-dB Beamwidth                         0.76° / 1.52°

                                               100KG7W - 18M0G7W – 36M0G7W
Max Available RF Power        (dBW/4 kHz)       -16.02    -16.02     -16.02
                              (dBW/MHz)           7.98      7.98       7.98

Maximum EIRP                  (dBW/4 kHz)         30.68       30.68    30.68
                              (dBW/MHz)           30.68       54.68    54.68
                              (dBW)               44.66       67.21    70.22

Interference Objectives:    Long Term          -154.0 dBW/4 kHz 20%
                            Short Term         -131.0 dBW/4 kHz 0.0025%

Frequency Information                          Transmit 6.1 GHz
Emission / Frequency Range (MHz)               100KG7W - 18M0G7W / 6059.15 - 6078.45 Band Edges
                                               100KG7W - 36M0G7W / 6108.45 - 6182.24 Band Edges
                                               100KG7W - 36M0G7W / 6271.54 - 6330.49 Band Edges
                                               100KG7W - 36M0G7W / 6360.49 - 6425.0 Band Edges


Max Great Circle Coordination Distance         221.8 km / 137.8 mi
Precipitation Scatter Contour Radius           100.0 km / 62.1 mi




Frequency Coordination and Interference Analysis Report                        05/22/2019         Page 7 of 10


                                                  COMSEARCH
                                              Earth Station Data Sheet
                                      19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                        (703)726-5500 http://www.comsearch.com


Coordination Values              ANCHORAGE, AK
Licensee Name                     Alaska Public Telecommunications, Inc.
Latitude (NAD 83)                 61° 11' 24.8" N
Longitude (NAD 83)                149° 48' 33.7" W
Ground Elevation (AMSL)           50.29 m / 165.0 ft
Antenna Centerline (AGL)          11.74 m / 38.5 ft
Antenna Mode                             Transmit 6.1 GHz
Interference Objectives: Long Term       -154.0 dBW/4 kHz 20%
                         Short Term      -131.0 dBW/4 kHz 0.0025%
Max Available RF Power                   -16.0 (dBW/4 kHz)

                                                              Transmit 6.1 GHz
               Horizon            Antenna                 Horizon        Coordination
Azimuth (°)    Elevation (°)      Discrimination (°)      Gain (dBi)     Distance (km)
 0              0.00               116.89                 -10.00          127.50
 5              0.00               111.91                 -10.00          127.50
 10             0.00               106.94                 -10.00          127.50
 15             0.00               101.96                 -10.00          127.50
 20             0.00                96.98                 -10.00          127.50
 25             0.00                92.01                 -10.00          127.50
 30             0.00                87.03                 -10.00          127.50
 35             0.00                82.05                 -10.00          127.50
 40             0.58                77.06                 -10.00          100.00
 45             0.58                72.08                 -10.00          100.00
 50             0.80                67.09                 -10.00          100.00
 55             1.04                62.10                 -10.00          100.00
 60             1.09                57.12                 -10.00          100.00
 65             1.09                52.14                 -10.00          100.00
 70             1.09                47.16                  -9.84          100.00
 75             1.20                42.18                  -8.63          100.00
 80             1.20                37.21                  -7.27          100.00
 85             1.63                32.21                  -5.70          100.00
 90             2.01                27.21                  -3.87          100.00
 95             2.26                22.22                  -1.67          100.00
100             3.32                17.13                   1.15          100.00
105             3.34                12.18                   4.86          100.00
110             2.20                 7.69                   9.85          109.19
115             3.68                 2.62                  21.53          221.80
120             2.96                 3.45                  18.56          190.89
125             2.09                 6.28                  12.05          151.27
130             1.92                 8.38                   8.92          118.55
135             2.03                10.09                   6.90          102.61
140             1.94                11.86                   5.14          100.00
145             1.67                13.65                   3.62          101.28
150             1.40                15.28                   2.39          104.69
155             1.25                16.62                   1.49          105.80
160             1.02                17.84                   0.72          109.51
165             0.81                18.83                   0.13          116.68
170             0.69                19.53                  -0.27          121.24
175             0.52                20.04                  -0.55          128.13
180             0.38                20.30                  -0.69          137.41
185             0.36                20.20                  -0.63          139.18




Frequency Coordination and Interference Analysis Report                05/22/2019        Page 8 of 10


                                                  COMSEARCH
                                              Earth Station Data Sheet
                                      19700 Janelia Farm Boulevard, Ashburn, VA 20147
                                        (703)726-5500 http://www.comsearch.com


Coordination Values              ANCHORAGE, AK
Licensee Name                     Alaska Public Telecommunications, Inc.
Latitude (NAD 83)                 61° 11' 24.8" N
Longitude (NAD 83)                149° 48' 33.7" W
Ground Elevation (AMSL)           50.29 m / 165.0 ft
Antenna Centerline (AGL)          11.74 m / 38.5 ft
Antenna Mode                             Transmit 6.1 GHz
Interference Objectives: Long Term       -154.0 dBW/4 kHz 20%
                         Short Term      -131.0 dBW/4 kHz 0.0025%
Max Available RF Power                   -16.0 (dBW/4 kHz)

                                                              Transmit 6.1 GHz
               Horizon            Antenna                 Horizon        Coordination
Azimuth (°)    Elevation (°)      Discrimination (°)      Gain (dBi)     Distance (km)
190             0.00                20.21                  -0.64          154.27
195             0.00                19.64                  -0.33          155.37
200             0.00                18.84                   0.12          156.99
205             0.00                17.83                   0.72          159.17
210             0.00                17.07                   1.19          160.92
215             0.00                17.67                   0.82          159.54
220             0.00                19.52                  -0.26          155.60
225             0.00                22.33                  -1.72          150.53
230             0.00               25.78                   -3.28          145.38
235             0.00                29.65                  -4.80          140.66
240             0.00                33.80                  -6.22          136.49
245             0.00                38.12                  -7.53          134.11
250             0.00                42.58                  -8.73          130.89
255             0.00                47.12                  -9.83          127.95
260             0.00                51.73                 -10.00          127.50
265             0.00                56.39                 -10.00          127.50
270             0.00                61.09                 -10.00          127.50
275             0.00                65.81                 -10.00          127.50
280             0.00                70.55                 -10.00          127.50
285             0.00                75.31                 -10.00          127.50
290             0.00                80.08                 -10.00          127.50
295             0.00                84.86                 -10.00          127.50
300             0.00                89.64                 -10.00          127.50
305             0.00                94.42                 -10.00          127.50
310             0.00                99.19                 -10.00          127.50
315             0.00               103.96                 -10.00          127.50
320             0.00               108.72                 -10.00          127.50
325             0.00               113.47                 -10.00          127.50
330             0.00               118.19                 -10.00          127.50
335             0.00               122.90                 -10.00          127.50
340             0.00               127.56                 -10.00          127.50
345             0.00               131.79                 -10.00          127.50
350             0.21               126.84                 -10.00          126.56
355             0.00               121.86                 -10.00          127.50




Frequency Coordination and Interference Analysis Report                05/22/2019        Page 9 of 10


5. CERTIFICATION




I HEREBY CERTIFY THAT I AM THE TECHNICALLY QUALIFIED PERSON RESPONSIBLE FOR THE
PREPARATION OF THE FREQUENCY COORDINATION DATA CONTAINED IN THIS APPLICATION,
THAT I AM FAMILIAR WITH PARTS 101 AND 25 OF THE FCC RULES AND REGULATIONS, THAT I
HAVE EITHER PREPARED OR REVIEWED THE FREQUENCY COORDINATION DATA SUBMITTED
WITH THIS APPLICATION, AND THAT IT IS COMPLETE AND CORRECT TO THE BEST OF MY
KNOWLEDGE AND BELIEF.




Timothy O. Crutcher
Frequency Planner
COMSEARCH
19700 Janelia Farm Boulevard
Ashburn, VA 20147


DATED: May 22, 2019




Frequency Coordination and Interference Analysis Report   05/22/2019   Page 10 of 10



Document Created: 2019-05-22 11:03:05
Document Modified: 2019-05-22 11:03:05

© 2019 FCC.report
This site is not affiliated with or endorsed by the FCC